Try and let processes exit on their own instead of calling process.exit();

appveyor.yml

@@ -1,9 +1,9 @@
 environment:
   matrix:
+    - nodejs_version: '0.10'
     - nodejs_version: '5'
     - nodejs_version: '4'
     - nodejs_version: '0.12'
-    - nodejs_version: '0.10'
 install:
   - ps: Install-Product node $env:nodejs_version
   - set CI=true

lib/babel.js

@@ -60,29 +60,19 @@ process.on('message', function (message) {
 });
 
 process.on('ava-exit', function () {
-	// use a little delay when running on AppVeyor (because it's shit)
-	var delay = process.env.AVA_APPVEYOR ? 100 : 0;
-
-	setTimeout(function () {
-		process.exit(0);
-	}, delay);
+	process.exit(0);
 });
 
 process.on('ava-teardown', function () {
 	var rejections = loudRejection.currentlyUnhandled();
 
-	if (rejections.length === 0) {
-		return exit();
-	}
-
-	rejections = rejections.map(function (rejection) {
-		return serializeValue(rejection.reason);
-	});
+	if (rejections.length !== 0) {
+		rejections = rejections.map(function (rejection) {
+			return serializeValue(rejection.reason);
+		});
 
-	send('unhandledRejections', {rejections: rejections});
-	setTimeout(exit, 100);
-});
+		send('unhandledRejections', {rejections: rejections});
+	}
 
-function exit() {
 	send('teardown');
-}
+});

lib/fork.js

@@ -11,6 +11,7 @@ module.exports = function (args) {
 
 	var filepath = path.join(__dirname, 'babel.js');
 	var file = args[0];
+	var exitTimer;
 
 	var options = {
 		silent: true,
@@ -30,6 +31,11 @@ module.exports = function (args) {
 		});
 
 		ps.on('exit', function (code) {
+			if (exitTimer) {
+				clearTimeout(exitTimer);
+				exitTimer = null;
+			}
+
 			if (code > 0 && code !== 143) {
 				return reject(new Error(file + ' exited with a non-zero exit code: ' + code));
 			}
@@ -66,7 +72,12 @@ module.exports = function (args) {
 
 	// teardown finished, now exit
 	ps.on('teardown', function () {
-		send(ps, 'exit');
+		// use a longer delay when running on AppVeyor (because it's shit)
+		var delay = process.env.AVA_APPVEYOR ? 200 : 100;
+
+		exitTimer = setTimeout(function () {
+			send(ps, 'exit');
+		}, delay);
 	});
 
 	// uncaught exception in fork, need to exit

test/fork.js

@@ -8,6 +8,7 @@ function fixture(name) {
 }
 
 test('emits test event', function (t) {
+	t.plan(1);
 	fork(fixture('generators.js'))
 		.on('test', function (tt) {
 			t.equal(tt.title, 'generator function');
@@ -16,6 +17,7 @@ test('emits test event', function (t) {
 });
 
 test('resolves promise with tests info', function (t) {
+	t.plan(3);
 	var file = fixture('generators.js');
 
 	fork(file)